The present invention relates to an automatic water supply apparatus for a flower pot and, more specifically, to an automatic water supply apparatus for a flower pot, which allows a user to directly input a height of a flower pot, adjusts a voltage of a pump in accordance with an inputted value, and supplies water to the flower pot by a predetermined flow rate. To this end, the automatic water supply apparatus for a flower pot comprises: an input unit (100) including a control box (110) installed on a glass window or one side of a flower pot (10), and an input unit (112) inputting a height and a water supply period of the flower pot on the outer side of the control box (110)； a control unit (200) including a voltage value DB (230) in which a voltage value corresponding to the height of each flower pot is set to control an underwater pump (310) with different voltage values in accordance with the height of the flowerpot, and a controller (210) detecting the voltage value corresponding to the height of the flower pot, inputted from the input unit (112), in the voltage value DB (230) to generate a control signal； a water supply unit (300) including an underwater pump (310) supplying water to the flower pot through a water supply hose (330) in accordance with the control signal generated from the controller (210), and a water tank (320) in which the water pump (310) is installed； and a power supply unit (400) installed on the front side or the rear side of the control box (110) and supplying power to the input unit (100), the control unit (200), and the water supply unit (300).COPYRIGHT KIPO 2018본 발명은 화분 자동 급수장치에 관한 것으로, 보다 상세하게는 화분의 높이 등을 사용자가 직접 입력하여 그 입력된 값에 따라 펌프의 전압을 조절하여 기 설정된 유량(流量)으로 화분에 물이 급수되도록 하는 화분 자동 급수장치에 관한 것이다.이를 위해 본 발명은, 화분(10)의 일측 또는 유리창에 설치되는 콘트롤박스(110)와, 상기 콘트롤박스(110)의 외측면에 화분의 높이 및 급수 주기를 입력하는 입력수단(112)으로 구성된 입력부(100)； 화분의 높이에 따라 각기 다른 전압 값으로 수중펌프(310)를 제어하도록 각 화분 높이와 대응되는 전압 값이 설정되어 있는 전압 값 DB(230)와, 상기 전압 값 DB(230)에서 상기 입력수단(112)으로부터 입력받은 화분의 높
